Hardware procurement
The single biggest “is this usable” factor is the drive. Buy it first, then let
preflight-check measure it. The USB read-speed math lives in
performance reality.
Recommended drives (mid-2026)
Section titled “Recommended drives (mid-2026)”| Tier | Drive | Interface | Real-world read | Why |
|---|---|---|---|---|
| Default / value | Samsung T7 Shield 2 TB | USB 3.2 Gen 2 (10 Gbps) | ~800-1,000 MB/s | IP65, drop-resistant, predictable on Mac/Win/Linux. The clean default. |
| Fast (Gen 2×2) | Crucial X10 Pro 2 TB | USB 3.2 Gen 2×2 (20 Gbps) | ~1,500-1,900 MB/s* | Best price/perf when the host supports 20 Gbps; falls back otherwise. |
| Fast (Gen 2×2) | Samsung T9 / PNY RP60 2 TB | USB 3.2 Gen 2×2 | ~2,000 MB/s* | T9 sustains writes past SLC cache; PNY RP60 is IP65 and undercuts on price. |
| Premium rugged | SanDisk PRO-G40 2 TB | Thunderbolt 3 + USB 3.2 Gen 2 | ~900-1,000 MB/s USB | IP68, 3 m drop, crush-resistant. Strongest field-carry option. |
*Gen 2×2 (20 Gbps) is rare on Macs and many laptop ports; confirm your host or treat Gen 2 (10 Gbps) as the realistic ceiling.
- Cheap USB flash “thumb” sticks and fake-capacity “2 TB” drives.
- USB 2.0 / 5 Gbps drives.
- No-name QLC SSDs with poor sustained read (SLC cache runs out mid-load).
Format & hygiene
Section titled “Format & hygiene”- Format and filesystem rules live in directory structure.
- Keep SHA-256 verification after every model download; see model packs.
Match the drive to your tier: Pocket/Field are fine on the T7 Shield, and Lab buyers should favor Gen 2×2 NVMe USB-SSD when the host supports it.
Sources: Tom’s Hardware — best external SSDs · Samsung T7 Shield · Crucial X10 Pro · SanDisk PRO-G40. Prices/availability move. Re-check before buying.